Physics

Question 1

Transverse Waves

Answer 1

Waves that move up and down (like an ocean wave)

Question 2

Longtiduinal/compressional waves:

Answer 2

Doesn’t move on the y axis (slinky like waves.)

Question 3

Velocity

Answer 3

How fast something moves in a certain direction

Question 4

Frequency

Answer 4

Amount of waves compressed.

Large wavelengths - Low frequency
Small wavelengths - high frequency

Question 5

Wavelength

Answer 5

Distance between peaks of waves

Question 6

Equilibrium

Answer 6

Middle line between crest and trough waves

Question 7

Crest and trough

Answer 7

Crest - Top of top wave

Trough - bottom of bottom wave

Question 8

One complete wave

Answer 8

One wave with a crest and one wave with a trough conjoined

Question 9

Amplitude

Answer 9

Distance between crest/trough and equilibrium

Question 10

Lateral inversion

Answer 10

Lateral inversion means that left and right have been flipped over.

Question 11

An image reflected in a plane mirror is…

Answer 11

virtual
not magnified
upright
laterally inverted

Question 12

Incidence and reflection

Answer 12

Incidence - original ray

Reflection - reflected ray

Question 13

Law of reflection

Answer 13

Angle of incidence is the same as the angle of reflection

Question 14

Virtual image

Answer 14

An image that forms in a mirror but you cannot physically touch it.

Question 15

Opaque

Answer 15

Light cannot pass through it.

All light is reflected or absorbed

Question 16

Translucent

Answer 16

Some light can pass through.

Most light is reflected.

Question 17

Transparent

Answer 17

Completely see through

All light passes through it.

Question 18

Transmitted

Answer 18

When light is projected through an object.

Question 19

When light enters a medium,

Answer 19

More to less dense- bends away from normal

Less to more dense - bends towards normal

Question 20

Total Internal Reflection

Answer 20

Occurs when the angle between the normal and the incident ray is greater than the critical angle.

So light keeps bouncing off in boundaries in the medium (water, diamond etc).

Total internal reflection only occurs when light travels into a medium with a low refractive index. This is because light bends away from the normal

Question 21

Critical angle

Answer 21

When the incident ray strikes the boundary between the 2 mediums at the critical angle, the refracted ray at the border.

When the angle of incidence and the angle of refraction is 90 degrees, the critical angle is 90 degrees.